211100021220121 has 8 divisors (see below), whose sum is σ = 230293622733984. Its totient is φ = 191906868121920.

The previous prime is 211100021220089. The next prime is 211100021220199. The reversal of 211100021220121 is 121022120001112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211100021220121 - 2⁵ = 211100021220089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100021220095 and 211100021220104.

It is not an unprimeable number, because it can be changed into a prime (211100021223121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111119200 + ... + 113002993.

It is an arithmetic number, because the mean of its divisors is an integer number (28786702841748).

Almost surely, 2^{211100021220121} is an apocalyptic number.

It is an amenable number.

211100021220121 is a deficient number, since it is larger than the sum of its proper divisors (19193601513863).

211100021220121 is a wasteful number, since it uses less digits than its factorization.

211100021220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224207831.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211100021220121 its reverse (121022120001112), we get a palindrome (332122141221233).

The spelling of 211100021220121 in words is "two hundred eleven trillion, one hundred billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".